Amazon Sidewalk Version 2.6.0 (October 10, 2025) - Release Notes#
Simplicity SDK Version 2025.6.2
Amazon Sidewalk is a secure, low-bandwidth, long-range wireless protocol designed to connect smart devices and extend their range beyond standard Wi-Fi or Bluetooth. It enables seamless connectivity for IoT devices in homes and neighborhoods, supporting features like device tracking, smart lighting, and sensor networks. For information about previous releases, see the release notes archive.
Release Summary#
Key Features | API Changes | Bug Fixes | Chip Enablement
Key Features#
Supporting Simplicity SDK 2025.6.2.
Supporting Amazon Sidewalk SDK 1.19.
Adding external Semtech transceiver support for Series 2 devices.
Configurable power optimizations.
Flexible time synchronization behavior.
Qualification application to support BLE only link types.
API Changes#
None.
Bug Fixes#
KG100S power consumption and transmit power optimization.
KG100S Radio switch control.
Custom Hardware's dependency fix to support Semtech transceivers.
Chip Enablement#
None.
Key Features#
New Features | Enhancements | Removed Features | Deprecated Features
New Features#
Supporting Simplicity SDK 2025.6.2.
Supporting Amazon Sidewalk SDK 1.19.
Adding external Semtech transceiver support for Series 2 devices.
Qualification application to support BLE only link types.
Enhancements#
Configurable power optimizations.
Flexible time synchronization behavior.
Qualification application to support BLE only link types.
Removed Features#
None.
Deprecated Features#
None.
API Changes#
New APIs | Modified APIs | Removed APIs | Deprecated APIs
New APIs#
None.
Modified APIs#
None.
Removed APIs#
None.
Deprecated APIs#
None.
Bug Fixes#
| ID | Issue Description | GitHub / Salesforce Reference (if any) | Affected Software Variants, Hardware, Modes, Host Interfaces |
|---|---|---|---|
| 1506203 | KG100S module GPIO0 pin handling. | None. |
|
| 1479608 | Building apps for custom hardware fails with Semtech transceivers. | None. |
|
Chip Enablement#
| Chip Family | OPNs / Boards / OPN Combinations | Supported Software Variants (if applicable) | Supported Modes | Supported Host Interfaces |
|---|---|---|---|---|
| EFR32FG25 | Boards: BRD4271A, BRD4270B, BRD4272A | N/A | SoC | N/A |
Application Example Changes#
New Examples | Modified Examples | Removed Examples | Deprecated Examples
New Examples#
None.
Modified Examples#
None.
Removed Examples#
None.
Deprecated Examples#
None.
Known Issues and Limitations#
None.
Impact of Release Changes#
Impact Statements | Migration Guide
Impact Statements#
None.
Migration Guide#
None.
Using This Release#
What's in the Release? | Compatible Software | Installation and Use | Help and Feedback
What's in the Release?#
The Sidewalk MCU SDK v2.6.0 release introduces several new capabilities and platform expansions. This release includes updated Out-of-the-Box (OOB) binaries, support for the Semtech LR1110 chip, and enabled Semtech-based solutions on all Series 2 Sidewalk supported families. Developers benefit from an easier configuration flow allowing seamless switching between Sub-GHz driver configurations and BLE-only solutions. Additionally, the SDK now supports the latest Silicon Labs SDK version 2025.6.2. This release includes Sidewalk SDK version 1.19.
Compatible Software#
| Software | Compatible Version or Variant |
|---|---|
| Simplicity SDK | Simplicity SDK 2025.6.2 |
| Amazon Sidewalk SDK | 1.19 |
Installation and Use#
To run your first demo, see our Getting Started Guides.
To kick start your development, see our Developer's Guide.
For information about Secure Vault Integration, see Secure Vault.
To review Security and Software Advisory notifications and manage your notification preferences:
Log in with your account credentials.
Click your profile icon in the upper-right corner of the page.
Select Notifications from the dropdown menu.
In the Notifications section, go to the My Product Notifications tab to review historical Security and Software Advisory notifications
To manage your preferences, use the Manage Notifications tab to customize which product updates and advisories you receive.
For recommended settings, configurations, and usage guidelines, see our Developer's Guide.
To learn more about the software in this release, dive into our online documentation.
Help and Feedback#
Contact Silicon Labs Support.
To use our Ask AI tool to get answers, see the search field at the top of this page.
Note: Ask AI is experimental.
Get help from our developer community.
Feature Matrix#
Unsupported Features#
Sidewalk Bulk Data Transfer (SBDT): Sidewalk BLE integrated OTA mechanism is available in our Sidewalk alpha repository, as it is not publicly accessible on the Amazon AWS side.
Switched Multiprotocol (SMP): Sidewalk, BLE, Z-Wave SMP PoC are available in our alpha repository.
SDK Release and Maintenance Policy#
See our SDK Release and Maintenance Policy.